If it is possible to match the brighness I try to do it. But to show the VW1000 or even the Lumis 3DS at 500 lumen is not the right thing to do I think and is not the best way to test. Lumenmatching is only one small thing to consider when testing projectors I think and I compare it to test cars, you dont match the power in each car to try to make them the same. I have tested the Lumis 3DS at full brightness side by side with the VW1000 and still I preferred the VW1000. Brightness is only one factor in a picture.

But even with cars you have to take into account the application usage. A Lamborghini would be lovely but if your primary use is driving it around the West Country in England or over speed bumps then it will prove fairly useless. Like wise if you only need 1000 lumens then perhaps using a filter to match lumens in an A/B test is something worth doing to be objective. Different factors of an image weigh differently with people as well.
For instance, I was checking out the LG OLED TV at Harrods today, they had a 4K 84" TV nearby and the majority of people were amazed by the 4K and barely noticed the OLED. The contrast ratio on the OLED was obviously far superior but size and brightness trumped it for the majority of viewers. So which is the better display?

But even with cars you have to take into account the application usage. A Lamborghini would be lovely but if your primary use is driving it around the West Country in England or over speed bumps then it will prove fairly useless. Like wise if you only need 1000 lumens then perhaps using a filter to match lumens in an A/B test is something worth doing to be objective. Different factors of an image weigh differently with people as well.
For instance, I was checking out the LG OLED TV at Harrods today, they had a 4K 84" TV nearby and the majority of people were amazed by the 4K and barely noticed the OLED. The contrast ratio on the OLED was obviously far superior but size and brightness trumped it for the majority of viewers. So which is the better display?

I personally would prefer the OLED and if possible OLED 4K.

I have tested alot of projectors and know that brightness is only one factor and to me it is not that important to even the brightness to see what projector is the best, but that is how I do it.